Lewisham Council - Brookmill Nature ReserveFind out about Brookmill Nature Reserve. Brookmill Nature Reserve contains part of a disused railway embankment between Brookmill Road and the busy lines from Lewisham to St Johns. History The railway The railway from Nunhead to Blackheath Hill opened https://lewisham.gov.uk/inmyarea/openspaces/nature-reserves/brookmill-nature-reserve